diff --git a/flask/app.py b/flask/app.py
index 3d344abb..7172fccb 100644
--- a/flask/app.py
+++ b/flask/app.py
@@ -200,7 +200,7 @@ class Flask(_PackageBoundObject):
     })
 
     #: the test client that is used with when `test_client` is used.
-    #: 
+    #:
     #: .. versionadded:: 0.7
     test_client_class = None